diff --git a/Makefile b/Makefile
index c7626c70..3c134418 100644
--- a/Makefile
+++ b/Makefile
@@ -281,6 +281,10 @@ top-all: $(TARGETS) $(EXTRA_TARGETS)
 	@echo "  Build successful."
 	@echo ""
 
+ifeq ($(CONFIG),emcc)
+yosys.js: $(filter-out yosysjs-$(YOSYS_VER).zip,$(EXTRA_TARGETS))
+endif
+
 yosys$(EXE): $(OBJS)
 	$(P) $(CXX) -o yosys$(EXE) $(LDFLAGS) $(OBJS) $(LDLIBS)